LT77 Gear box needed - Defender Source
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  #1  
Old May 10th, 2012, 02:37 AM
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Dave Thiessen
85 Land Rover 110
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LT77 Gear box needed

1985 110 EXMOD with 2.8 Isuzu 4jb1T. My LT77 is about to take a crap. Clunk of death has gotten past the point of being ginger with the clutch and accelerator and I'm going to damage just about everything else in the system if i dont swap it out. Anyone who has a good LT77 please let me know the series number and send me some pictures of the input and output shaft splines. I live in San Diego.

Other things that you might have that i need:
Fuel Gauge Sending unit
Speedo and Cable
Wheel bearing gasket kits
Interior Body panels for rear window area
110 molded headliner in decent shape
Rear seat belts
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  #2  
Old May 10th, 2012, 11:23 AM
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Matt
1993 D110
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Dave,
I have the LT77 out of my 93 110. On the interior body panels for rear window area, are you talking about the trim pieces? If so, have those in grey - also from my 93.
Thanks,
Matt
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  #3  
Old May 10th, 2012, 12:17 PM
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John B.
1991 Defender 90, 200TDI
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Just make sure you get a G or H suffix... The layshaft bearings on the earlier models are tiny and love to fail.

I "assume" you need a short shaft diesel version? If so the one above from a NAS 110 would not work.

On the speedo, get a VDO.... Not worth any hassle fixing a stock speedo. They are junk.
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  #4  
Old May 10th, 2012, 02:01 PM
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Chad Davis
1984 Defender 90
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John is 100% right about the stock speedo, I learned that one the hard way.
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  #5  
Old May 10th, 2012, 06:12 PM
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shayne young
89,93 & 95 camel trophy 110s 06 130
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and hes right about the tranny too...hehehe...he said tranny..
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  #6  
Old May 10th, 2012, 08:15 PM
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Dave Thiessen
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I'm fairly certain that I need the long shaft (that's for shayne) gear box and not the short. It's got the long bell housing, not like the short LT77 ones that they had on discos... unless i'm completely off base. After some research, I think the clunk may be coming from a lot of play in my front differential. The syncros aren't working very well though and shifting is difficult at times so i'm pretty sure the box needs to be changed as well.
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  #7  
Old May 11th, 2012, 12:07 AM
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John B.
1991 Defender 90, 200TDI
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All Discos have a different shifter location, called short stick. There is long stick versus short stick and these are not interchangable without a complete rebuild. The bellhousing length is a different thing as well.... There are also V8 and Diesel versions with different gears and input shafts... You need to make sure you get the correct one...

Find the serial number of the box you have and post it up.
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  #8  
Old May 11th, 2012, 01:35 AM
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Jack Quinlan
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I'm pretty damn sure you have a short bell housing, short shaft diesel LT-77. You probably have the military gearbox with the lower 1st gear.

If I were you I'd open up the housing for the shift linkage. There's a little set screw in there that likes to loosen up and it feels like the who gear box is going when really the shifter is just slipping. It's worth a look see.
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  #9  
Old May 11th, 2012, 01:45 AM
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Dave Thiessen
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Hey John Thanks for the help. It's HRC1944 R2 G4. I'll lift up the shifter plate and take a look. I wouldnt be surprised if it did have lower 1st gearing. It takes a bit to get going. Picking up the front diff in the morning from British Car Repair, Pt Loma
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  #10  
Old May 11th, 2012, 08:56 AM
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J. Michael McCaig
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Check your hubs for wear too. They can contribute greatly to slack in the driveline. Hard shifting can also be caused by the clutch being out of adjustment.
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  #11  
Old May 11th, 2012, 11:46 AM
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Clutch is brand new, about a month old with new master and slave cyl's. I dont think the clutch is the problem. Checked the axle splines last night, looked ok.
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  #12  
Old November 12th, 2012, 04:12 AM
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Dave Thiessen
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I have bled this clutch so many times, i know it's not the problem. Syncros are still bad and there is a lot of noise in the box when engaging the clutch between 1st and second and second and third gear (output shaft). Better start looking for a new box for real.

My truck pretty much sat in my drive way from may to last week. Pulled the front axles out and removed the prop shaft. I'm now running as a 2WD until i replace the axles and diff to 24 spline next month.
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  #13  
Old November 16th, 2012, 10:50 PM
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Jon Paulikonis
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Dave - not to hijack the thread, but I also have a 4JB1T conversion in my Stage One.

If possible, I would like to get your contact info, as finding parts has been somewhat difficult.

If you could email me at jpandlp@cox.net, I would appreciate it.
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